Trivia: This was the last cartoon in the original Merrie Melodies series, ending a run that had continued since 1931. It was also the 1,000th cartoon short released by Warner Brothers.
Trivia: Originally, Metro Goldwyn Mayer had planned for producer Roger Corman to make a film entitled "Captain Nemo and the Floating City," but the project collapsed early on. Producer Steven Pallos later resurrected the project as "Captain Nemo and the Underwater City," and this time the film was completed.
Trivia: Warren Mitchell (born 1926) was only eleven years older than Una Stubbs (born 1937), who plays his daughter.
Trivia: During the scene at LaGuardia Airport in New York, Hitchcock appears in a wheelchair being pushed by a nurse. He stands up to shake hands with a man and walks off to the right.